Publisher is one part of the Office suite of productivity applications. Its purpose is to help individuals design, create and publish 'marketable' publications such as brochures, flyers, ads and menus. Products are high quality and recognizable. Publications can be personalized, prepared for print and even web-distributed within the program.
Publisher works seamlessly with other Office products. You may need to download Microsoft file converters to move back and forth between older versions of Office.

Examples:

Online - free - tutorials:

http://office.microsoft.com/en-us/publisher/FX100649121033.aspx

http://www.learnthat.com/computers/learn-433-microsoft_publisher_2003.htm

http://inpics.net/tutorials/publisher2003/basics.html

How to design a Newsletter using Publisher 2003

How to design a Brochure using Publisher 2003